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Mean Well DRDN20-24 Redundancy Module Power Supply 20A - DIN Rail

redundancy modulesupport 1+1 and N+1 redundancyrelay contacts for monitoring power status

SKU DRDN20-24

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Overview

DRDN20-24 is the model of this series: rated current 0~20A per input Continuous, typical efficiency 98%.

The DRDN20 series is a 20A redundancy module that can be used with a power supply to improve overall system operation reliability. Product key features include:12V/24V/48V input voltage for selection, support N+1 and 1+1 redundancy systems,built-in two rails DC input contacts and single output. The MOSFET technology implemented can reduce heat loss and reduce the voltage difference between the input and output voltages, built-in 2 channels DC OK relay contacts for monitoring output status, ultra-wide operating temperature of -40 to +80℃ and narrow width (32mm).

Features

Support 1+1 and N+1 redundancy system
2 channels input and 1 output
Suitable for redundancy operation of 12V/24V/48V system
Output current up to 20A
Cooling by free air convection
-40~+80℃ ultra-wide operating temperature ( >+60℃ derating)
32mm slim width
Built-in 2 channels DC OK signal and alarm relay contact
Installed on DIN Rail TS35/7.5 or 15
3 years warranty

Specifications

DRDN20-24Specifications from the official datasheet (2026-03-31 edition)

MODEL

MODEL: DRDN20-24

INPUT

NUMBER OF INPUT: 2 Channels
DC NORMAL VOLTAGE: 24Vdc
DC VOLTAGE RANGE: 19~29Vdc
RATED CURRENT: 0~20A per input Continuous
VOLTAGE DROP (Vin-Vout) (max.): 0.25V
PEAK CURRENT: 0~30A per input 5Sec.
EFFICIENCY (Typ.): 98%
INPUT REVERSE CURRENT (max.): 1mA
INPUT REVERSE VOLTAGE (max.): 40Vdc

OUTPUT

RATED CURRENT: 0~20A, Continuous
PEAK CURRENT (max.): 30A, 5Sec.
CAPACITANCE(Typ.): 320uF
STANDBY POWER LOSSES(Typ.): 1.5W

PROTECTION

OVERLOAD: <30A,5Sec. No damage
SHORT CIRCUIT: <30A,5Sec. No damage

FUNCTION

REDUNDANCY: For 1+1 redundancy ,and support N+1 redundancy
BOTH INPUTS VOLTAGE ALARM: <18V or >31V (±5%)
RELAY: 30Vdc/1A resistive load
LED STATUS DISPLAY: Green LED OK

ENVIRONMENT

COOLING: Free air convection
WORKING TEMP.^Note.2: -40 ~ +80℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 5 ~ 95% RH non-condensing
STORAGE TEMP.: -40 ~ +85℃
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 60℃ )
VIBRATION: Component:10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes; Mounting: Compliance to IEC61373
OPERATING ALTITUDE^Note.3: 5000 meters/OVC II

SAFETY & EMC

SAFETY STANDARDS: IEC62368-1, UL62368-1, EAC TP TC 004 approved
WITHSTAND VOLTAGE: IP/OP - Chassis : 0.5KVac ; IP/OP- Relay : 0.5KVac ; Relay - Chassis : 0.5KVac
ISOLATION RESISTANCE: IP/OP - Chassis, IP/OP- Relay, Relay - Chassis:>100M Ohms / 500Vdc / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55032(CISPR32) Class B
Radiated BS EN/EN55032(CISPR32) Class B
Voltage Flicker ----- -----
Harmonic Current ----- -----
EMC IMMUNITY: BS EN/EN55035, BS EN/EN61000-6-2(BS EN/EN50082-2)

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 4, 15KV air; Level 3, 8KV contact; criteria A
Radiated BS EN/EN61000-4-3 Level 3, 10V/m; criteria A
EFT / Burst BS EN/EN61000-4-4 Level 3, 2KV; criteria A
Surge BS EN/EN61000-4-5 Level 3, 1KV/Line-Line ;Level 3, 2KV/Line-Line-Chassis ;criteria A
Conducted BS EN/EN61000-4-6 Level 3, 10V; criteria A
Magnetic Field BS EN/EN61000-4-8 Level 4, 30A/m; criteria A

Parameter	Standard	Test Level
Conducted	BS EN/EN55032(CISPR32)	Class B
Radiated	BS EN/EN55032(CISPR32)	Class B
Voltage Flicker	-----	-----
Harmonic Current	-----	-----

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 4, 15KV air; Level 3, 8KV contact; criteria A
Radiated	BS EN/EN61000-4-3	Level 3, 10V/m; criteria A
EFT / Burst	BS EN/EN61000-4-4	Level 3, 2KV; criteria A
Surge	BS EN/EN61000-4-5	Level 3, 1KV/Line-Line ;Level 3, 2KV/Line-Line-Chassis ;criteria A
Conducted	BS EN/EN61000-4-6	Level 3, 10V; criteria A
Magnetic Field	BS EN/EN61000-4-8	Level 4, 30A/m; criteria A

OTHERS

MTBF: 1836.0K hrs min. Telcordia SR-332 (Bellcore) ; 482.1K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 32*125.2*102mm (W*H*D)
PACKING: 0.35Kg;28psc/10.8Kg/1.23CUFT

Test conditions and notes4

1. All parameters NOT specially mentioned are measured at normal input (12V/24V/48V), rated load and 25℃ of ambient temperature.
2. Derating may be needed over high ambient temperature. Please check the derating curve for more details.
3. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).
4. The power supply is considered as an independent unit, but the final equipment still need to re-confirm that the whole system complies with the EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )

Technical drawings

DRDN20-24 Derating Curve — Derating Curve

DRDN20-24 Typical Application Notes — Typical Application Notes

DRDN20-24 Mechanical Specification — Mechanical Specification

Typical applications

Industrial control system
Semiconductor fabrication equipment
Factory automation
Electro-mechanical apparatus

Downloads

Certificates6

Mean Well DRDN20-DRDN40-ERDN20-ERDN40 CB(UL) Certificate PDF Download

Mean Well DRDN20-40 EMC Certificate PDF Download

Mean Well DRDN20-40 CE-dec Certificate PDF Download

Mean Well DRDN20-40 UK-dec Certificate PDF Download

Mean Well EAC Certificate PDF Download

Mean Well E215312-UL Certificate PDF Download

Test reports1

Mean Well DRDN20-24 Test Report PDF Download

Catalogues2

Mean Well Catalog (Industrial) PDF Download

Mean Well DIN RAIL Catalog PDF Download

FAQ

Can I use the DRDN20-24 in a 24V PLC cabinet that needs redundant power paths?

Yes, this model is designed for 24V systems with a 19-29Vdc input range and is rated for 20A continuous. Its redundancy module design supports 1+1 and N+1 redundancy, which makes it suitable for PLC cabinets built around redundant 24V power architecture.

Is the DRDN20-24 a good fit for industrial automation panels with 24V control loads?

It is suitable for industrial automation panels that distribute 24V control power and need redundancy support. The unit is rated for 20A continuous, and its 125.2 x 102.0 x 32.0 mm body helps preserve panel space on DIN rail.

Can this model be used in a building automation enclosure for 24V controllers and field panels?

Yes, it fits building automation enclosures where the control side is standardized on 24V and the redundant path must stay within 20A continuous. Relay contacts for monitoring power status also help when cabinet alarms or supervisory signals are part of the design.

Can the DRDN20-24 be used for redundant 24V power in a compact DIN rail control cabinet?

Yes, the unit is intended for DIN rail installations and has a 32.0 mm profile within its 125.2 x 102.0 x 32.0 mm dimensions. That slim form factor is useful in compact control cabinets that still need 24V redundancy up to 20A.

How does the DRDN20-24 compare with the other DRDN20 models?

The DRDN20-24 is the 24V version of the DRDN20 series with a 19-29Vdc input range. The DRDN20-12 is the 12V version with 9-14Vdc input, while the DRDN20-48 is the 48V version with 36-60Vdc input. All three are rated 20A continuous, use the same 125.2 x 102.0 x 32.0 mm housing, weigh 0.35 kg, operate from -40°C to +80°C (with derating), and are approved to IEC62368-1, UL62368-1 and EAC TP TC 004.

Should the DRDN20-24 be used inside a cabinet or in an exposed environment?

The available specs support use in industrial control environments and list operation from -40°C to +80°C, but no IP rating is provided. In practice, that points to use inside a control cabinet or enclosure rather than in an exposed location.

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